Cross-chain transaction evaluation method and system based on polynomial commitment

The invention discloses a cross-chain transaction assessment method and system based on polynomial commitment, and relates to the technical field of blockchains, and the method comprises the steps: obtaining the related information of a to-be-assessed cross-chain transaction based on a transaction participant blockchain, and taking the related information as to-be-assessed transaction information; according to a polynomial commitment algorithm, performing encryption processing on the to-be-evaluated transaction information according to the information category, and generating a polynomial commitment; performing existence verification and validity verification of the cross-chain transaction through polynomial commitment; and when the existence verification result and the validity verification result both pass verification, executing the cross-chain transaction. The technical problems that cross-chain transaction evaluation depends on third-party auxiliary service and is low in safety and reliability in the pri